Telephone-call register



(No MbdeL) v W. T. GBNTRT' TELEPHONE CALL REGISTER- Patented 001;. 16, 1894.

W /TNEESES- UNITED STATES PATENT OFFICE.

WILLIAM THOMAS GENTRY, OF ATLANTA, GEORGIA.

TELEPHONE-CALL REGISTER.

SPECIFICATION forming part of Letters Patent No. 527,759, dated October 16, 1894.

Application filed April 20, 1894- Serial No. 508,330. (No model.)

To 00% whom it may concern.-

Be it known thatI, WILLIAM THOMAS GEN- TRY, a citizen of the United States of America, and a resident of Atlanta, in the county of Fulton and State of Georgia, have made certain new and useful Improvements in Telephone-Registers; and I do hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others Skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The invention is illustrated in the drawings as follows.

Figure 1 is an elevation of a telephone with this device attached thereto, showing however only a face view of the device. Fig. 2 is a detail somewhat diagrammatical of the mechanism of the device. Fig. 3 is a side elevation of aportion thereof, showing the construction further.

In the figures like reference marks indicate corresponding parts in all the views.

A is the telephone, aindicating the baseor wall-board thereof,and a a projection thereof, either integral or attached thereto. A suitable casing B is secured to the projection a and within this casing is arranged a bell and striking device therefor, together with a train of registering wheels, as will now be described.

0 is the bell which is mounted on a standard screwed preferably into the base a, and near same suitably journaled in the base is a tumbler 0 adapted to receive a key of the desired pattern, and having on its side an arm 0. A clapper c" .is mounted so as to ring the bell when released and has an arm projecting to within reach of the arm 0 so that said bell will be rung upon each revolution of the tumbler. This bell may obviously be electrically operated and the arm 0 would then operate a circuit maker. A gear 01 on this tumbler meshes with a gear 01' on the pivot e which pivot carries a pinion f engaging in turn the gear d" on a pivot e e which in turn has a pinion f which meshes with the gear 01" ona pivot f". Each of these pivots f, f, and f is provided on its outer end with a pointer g and the train of gears composed of the gears and pinions are proportioned ten to one, so that the first pointer registers from one to ten turns of the tumbler on the dial h; the second pointer from ten turns to one hundred, while the remaining pointer registers up to one thousand turns. it is a plate or cover for the casing and h" is a key-hole therein registering with the keyhole in the tumbler.

The operation of this device is as follows: The subscriber connects with the call wire or otherwise calls for the desired connection and is told by the operator to insert and turn his key. He then inserts the same and by means thereof produces one revolution of the tumbler registering one thereby, after which he withdraws his key. As the key is turned the bell is rung and heard by the operator at the central office, who knows that he has registered that conversation. If desired, the operator may first call the subscriber to whom the first named subscriber wishes to speak before directing theinsertion of the key.

The object of this invention is to enable exchanges to charge a toll and so furnish such subscribers as use the telephone very little with an instrument at a comparatively low' cost. It is also intended to operate this device in connection with the Law system and magneto exchanges in the following described manner.

For Law-system exchanges the key will first be inserted and turned half-way around operating the cylinder which will be provided with a circuit closing device which will close the call-wire circuit and allow the subscriber to give his order for connection to the operator, who can after receiving his order request him to turn the key the remainder of one full revolution which will sound the gong which may as before stated be either sounded mechanically or electrically, and leave the call wire open or disconnected again.

For magneto-system exchanges, the ringing or generator circuit isnormally left open and closed-by a switch operated by inserting the key and turning the tumbler one-half revolution. After this the central office should be called by ringing and after the operators response thereto the cylinder is revolved the tion instrument of a tumbler adapted to re ceive a key and having connection with a sounder, set upon the base-board of the instrument, and adapted by its rotation to operate same, and a counting train connected revolubly with said tumbler, for the purpose specified.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

WILLIAM THOMAS GENTRY.

Witnesses:

A. P. W001), EDWD. P. WooD. 

